I am always interested to hear what people do not like about a language, and I think it says a lot about what they really know. I get the point of this article

I am always interested to hear what people do not like about a language, and I think it says a lot about what they really know. I get the point of this article...but it is a bit bland, short, and doesn't really offer much in the ways of why this is dangerous or how it applies to the average Joe. Maybe with some more meat this article would be a big selling point; however, right now it offers, what may be a completely valid point, masqueraded behind a very thin veil of, "Because others say so!" Tell me why!! Give me an example. Show me how Node.JS fails at distributed concurrency because it is an over-use of it! :)